Nail polisher



FIG. 1 is a perspective view of a nail polisher, showing my new design;

FIG. 2 is a front view thereof, a rear view being omitted because it is the same as the front view;

FIG. 3 is a left-side view thereof;

FIG. 4 is a right-side view thereof; and,

FIG. 5 is a top view thereof; a bottom view being omitted because it is the same as the top view. 

CLAIM The ornamental design for a nail polisher, as shown and described. 